Joined: Sep 2019 Posts: 3 Threads: 1
Reputation:
0
Location: Johannesburg
Car type: Austin7 1928 part of GECup, 1930 Chummy
The 8SWG spokes on my car are threaded 32TPI. Are new 32TPI nipples available in the UK?
I have been offered 40TPI nipples but then I have to replace all the spokes.
I note that to BSC standard 8SWG spokes should be threaded 40TPI, but did Austin deviate from this and make their 7 and 8SWG WITH 32TPI?
The wheels I have stripped all have ‘Austin script’ centres. No 40 TPI threads found on any..
Joined: Aug 2017 Posts: 324 Threads: 13
Reputation:
3
I seem to remember that Austin Seven spokes are - like most vintage spokes - a BA size rather than cycle, Yes, they are 32 tpi.
Where you get them from I wouldn't know.
Joined: Apr 2022 Posts: 40 Threads: 2
Reputation:
0
Location: East Sussex
Car type: Biggs Special, RN, AD, EA rep
Have you tried our cherished suppliers such as MWS and Nick Mouat?
Joined: Sep 2019 Posts: 3 Threads: 1
Reputation:
0
Location: Johannesburg
Car type: Austin7 1928 part of GECup, 1930 Chummy
Thank you for your response to my questions.
Yes, I have been in contact with both the names that you mention.
It was Nick who told me that Austin spokes are to BSC specification.
BSC has a thread angle of 60degrees, BA has a 47.5degree 'profile', quite a difference.
I look forward to hearing from others.
To rebuild my wheels I have made a jig based on that described by Ian Moorcroft and also read the guidance on the Cornwall A7 Club's website, my thanks to both sources.
Joined: Aug 2017 Posts: 324 Threads: 13
Reputation:
3
24-03-2025, 02:58 PM
(This post was last modified: 24-03-2025, 03:03 PM by Ray White.)
My apologies for suggesting it might not be cycle thread. 32 tpi is definitely not a BA size
5/32" or 8 AWG I believe.
Joined: Sep 2019 Posts: 3 Threads: 1
Reputation:
0
Location: Johannesburg
Car type: Austin7 1928 part of GECup, 1930 Chummy
No problem Ray, I too thought they may have been BA threaded until Nick put me right.
